I ordered a visa from them Thursday for my January trip. It arrived today. I wanted to get it purchased to beat any possible new restrictions. I bought my airfare too. My only worry is that decreased demand caused by new restrictions could cause flights MIA to SNU to be cancelled. If a new flight needed booking, it might require new OFAC clearance.
Just getting the visa doesn't give you "OFAC clearance". You don't get OFAC clearance. If a general license applies, it applies when you travel. If the rules of OFAC licenses are changed, then you need to look at the new rules.
I would think that the majority of travellers on that route are Cuban Americans. They are likely to continue.
Thanks! Within reason, I'm willing to add to my activities to stay legal if necessary. If rules are tightened, I wouldn't mind mentoring a few people in programming languages. In fact, I may even do that in Miami when I retire. It's such a waste seeing people who completed medical school work a minimum wage job. Anyone that smart can learn Information Technology, but no government license is required to do surgery on software instead of people.

